Anti-blocking seed zooming type seed suction disc of air vibration type precision seeder and control method

Abstract

The application discloses a kind of air vibration type precision seeding machine anti-stuck seed zooming type seed suction disc and control method, belong to the field of agricultural air vibration type precision seeding machine;Including: air chamber, air outlet pipeline, motor, support plate, screw rod and the like;Contraction type hole upper suction plate has contraction type suction hole, suction hole is composed of V-shaped hole and straight hole;Expansion type hole lower suction plate has expansion type suction hole;When seeding machine starts to work, seed suction disc is close to vibration seed population, fan negative pressure seed suction, seed is adsorbed on the expansion type suction hole of expansion type hole lower suction plate;Seed suction disc moves to the top of seedling tray, expansion type suction hole is aligned with each hole of seedling tray, motor drives expansion type hole lower suction plate to move upwards, and straight hole of contraction type hole upper suction plate is embedded into expansion type suction hole of expansion type hole lower suction plate, and seed adsorbed or stuck in expansion type suction hole is discharged into the hole of seedling tray with fan positive pressure, to realize clear seed.The application achieves technical effect: in the process of seed discharge, can clear seed with high efficiency, prevent seed sticking problem.

Description

Technical Field

[0001] This invention relates to the field of agricultural pneumatic precision seeders, specifically to a seed suction disc for a pneumatic precision seeder with anti-jamming and retractable design, and a control method thereof. Background Technology

[0002] Traditional mechanical seedling seeders suffer from problems such as poor uniformity and low seedling survival rate, while pneumatic precision seeders have advantages such as high precision and less risk of seed damage, and can meet the requirement of 1 to 2 seeds per hole for precision seedling raising and sowing of super hybrid rice.

[0003] In the operation of a pneumatic precision seeder, when the vibrating seed tray begins to vibrate, the robotic arm moves the seed suction tray close to the vibrating seed cluster. A fan applies negative pressure to suction the seeds, and the robotic arm moves the seed suction tray to the top of the seedling tray, where it then dispenses the seeds. During operation, the suction holes of the seed suction tray can become clogged with seeds, a phenomenon known as seed jamming. If the blockage is not cleared, the probability of empty holes increases significantly, affecting sowing efficiency. Existing seed cleaning methods mostly involve brush cleaning and needle cleaning. Brush cleaning is ineffective, leaving some seeds stuck in the suction holes. Needle cleaning, often done from the outside in, can push stuck seeds into the air chamber, affecting the suction and dispensing process and potentially damaging the fan. Current seed suction trays have a simple structure with a single suction plate, which can easily leave seeds in the suction holes during the suction and dispensing process, affecting subsequent suction and dispensing, leading to an increased empty hole rate and severely impacting sowing efficiency.

[0004] To address the above problems, this invention, in order to reduce the empty seed rate and increase the sowing rate, designs an anti-seed jamming, retractable seed suction plate. The seed suction plate is moved above the seedling tray by a robotic arm. When it is ready to discharge seeds, the motor controls the support plate to drive the expanding hole lower suction plate to move upward, so that the straight hole of the contracting hole upper suction plate is embedded into the expanding suction hole of the lower suction plate. Combined with positive pressure air blowing by a fan, the seeds are discharged and seed jamming is prevented. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the prior art by disclosing a pneumatic vibration precision seeder with an anti-jamming, retractable seed suction disc, comprising:

[0006] The air chamber is a truncated pyramid structure with the upper and lower bases parallel to each other. Both the upper and lower bases are rectangular, and all four lateral edges are equal. The lower base is open.

[0007] The air outlet duct is symmetrically fixed to the upper and lower surfaces of the air chamber and connected to the fan through the pipe; it can control the formation of positive or negative pressure in the air chamber.

[0008] The shrink-type suction plate is a transparent plastic plate that is fixed to the opening on the bottom surface of the air chamber to form a closed air chamber. The shrink-type suction plate has shrink-type suction holes, which are composed of V-shaped holes and straight holes.

[0009] The expanding-hole suction plate is made of transparent plastic and has expanding suction holes. The V-shaped holes, straight holes, and expanding suction holes are aligned to form a sowing channel.

[0010] The support plate is fixed to the edge of the expansion-hole suction plate where there are no holes.

[0011] The screw is fixed to the screw hole in the support plate;

[0012] The motor is connected to the upper end of the screw, and it can drive the support plate and the expansion hole suction plate to move up and down through the screw.

[0013] In the improved design, the air outlet ducts are symmetrically fixed on the upper and lower surfaces of the air chamber, and the contact surfaces of the two air outlet ducts with the air chamber are connected.

[0014] In the improved design, the support plate is fixed in the middle of the blank edge of the expansion hole lower suction plate, supporting the expansion hole lower suction plate to move upward. The support plate, motor and screw are symmetrically fixed at both ends of the expansion hole lower suction plate.

[0015] In the improved design, the shrinkage suction holes on the upper suction plate of the shrinkage hole correspond one-to-one with the expansion suction holes on the lower suction plate of the expansion hole.

[0016] In the improved design, the straight hole of the shrink-type upper suction plate contacts the expanding suction hole of the expanding-type lower suction plate without any gap.

[0017] In the improved design, the motor-driven support plate moves the expanding hole lower suction plate upward or downward, causing the straight hole of the contracting hole upper suction plate to be inserted into or removed from the expanding suction hole of the expanding hole lower suction plate.

[0018] A control method for the anti-jamming retractable seed suction disc of a pneumatic precision seeder:

[0019] When the seeder starts working, the seed suction plate approaches the vibrating seed cluster, and the fan uses negative pressure to suction the seeds, which are then adsorbed onto the expanded suction holes of the lower suction plate. The seed suction plate moves above the seedling tray, aligning the expanded suction holes with each hole in the seedling tray. The motor drives the lower suction plate of the expanded hole to move upward, inserting the straight hole of the upper suction plate of the contraction hole into the expanded suction hole of the lower suction plate of the expanded hole. The seeds adsorbed or stuck in the expanded suction holes are then discharged into the holes of the seedling tray using the positive pressure of the fan, thus achieving seed removal.

[0020] Furthermore, for seeds stuck in the suction hole, the movement of the expanding suction plate is controlled to insert the straight hole into the expanding suction hole, squeezing the seed out of the suction hole. Combined with the positive pressure of the fan, there is double protection when discharging and cleaning the seeds; and the seeds are cleaned at the same time as discharging, saving time and improving sowing efficiency.

[0021] The beneficial effects of this invention are:

[0022] The seed suction plate described in this invention can efficiently clean seeds. Without affecting the sowing efficiency, during the seed suction plate's seed dispensing process, the motor drives the lower suction plate to move upward, and the straight hole of the upper suction plate is embedded into the expansion hole of the lower suction plate. Combined with positive pressure blowing, the seed dispensing and cleaning are carried out, effectively preventing seed jamming, reducing the empty hole rate, and improving the seeding qualification rate of the seeder. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a side view of the shrink-fit orifice suction plate;

[0025] Figure 3 This is a schematic diagram of the suction hole structure of the shrink-type suction plate;

[0026] Figure 4 This is a side view of the expansion-type bottom suction plate;

[0027] Figure 5 This is a schematic diagram of the suction hole structure of the expansion-type suction plate;

[0028] Figure 6 This is a structural schematic diagram of the support plate;

[0029] Figure 7 This is an enlarged schematic diagram of the seed suction disc;

[0030] Figure 8 It is a workflow diagram;

[0031] Figure 9 This is a schematic diagram of the suction hole structure for seed absorption;

[0032] Figure 10 This is a schematic diagram of the suction hole structure for seed metering;

[0033] Figure 11 This is a partial structural simulation diagram during seed absorption;

[0034] Figure 12 This is a partial structural simulation diagram during seeding;

[0035] The markings in the diagram are: 1-air chamber, 2-air outlet duct, 3-motor, 4-contraction-type upper suction plate, 41-contraction-type suction hole, 411-V-shaped hole, 412-straight hole, 5-expansion-type lower suction plate, 51-expansion-type suction hole, 6-support plate, 61-screw hole, 7-screw. Detailed Implementation

[0036] The invention will now be further described with reference to the accompanying drawings.

[0037] like Figure 1As shown, as a specific embodiment of the present invention, a pneumatic precision seeder with an anti-jamming, retractable seed suction plate is disclosed, which can be used in the field of agricultural pneumatic precision seeders. The seed suction plate includes an air chamber 1, an air outlet pipe 2, a motor 3, a retractable upper suction plate 4, an expanding lower suction plate 5, a support plate 6, and a screw 7.

[0038] like Figure 2 As shown, the retractable suction plate 4 is fixed to the bottom surface of the air chamber 1. The bottom surface of the air chamber 1 is an opening. After the retractable suction plate 4 is installed, air is vented through the retractable suction holes 41 of the retractable suction plate 4. The retractable suction plate 4 is made of transparent acrylic material, and 434 retractable suction holes 41 are arranged on the retractable suction plate 4.

[0039] like Figure 3 As shown, the shrinkage suction hole 41 on the shrinkage suction plate 4 is composed of a V-shaped hole 411 and a straight hole 412.

[0040] like Figure 4 As shown, the expanding hole lower suction plate 5 moves upward under the action of the motor 3 driving the support plate 6, and then contacts the straight hole 412 part of the contracting hole upper suction plate 4, and the contact surface is seamless. The expanding hole lower suction plate 5 is made of transparent acrylic material, and 434 expanding suction holes 51 are arranged on the expanding hole lower suction plate 5.

[0041] like Figure 5 As shown, the small-diameter hole above the expansion suction hole 51 of the expansion-type hole lower suction plate 5 contacts the straight hole 412, and the expansion suction hole 51 of the expansion-type hole lower suction plate 5 corresponds one-to-one with the straight hole 412 of the contraction-type hole upper suction plate 4.

[0042] like Figure 6 As shown, one end of the support plate 6 without screw holes 61 is fixed to the edge of the expansion hole suction plate 5 without expansion holes 51, and drives the expansion hole suction plate 5 to move upward or downward.

[0043] like Figure 7 As shown, one end of the support plate 6 is fixed with an expansion-hole lower suction plate 5, and a screw 7 is installed in the screw hole 61 of the support plate 6. The motor 3 is connected to the upper end of the screw 7. When the motor 3 drives the support plate 6 to move the expansion-hole lower suction plate 5 upward, the straight hole 412 of the contraction-hole upper suction plate 4 is embedded into the expansion suction hole 51 of the expansion-hole lower suction plate 5. When the motor 3 drives the support plate 6 to move the expansion-hole lower suction plate 5 downward, the straight hole 412 of the contraction-hole upper suction plate 4 leaves the expansion suction hole 51 of the expansion-hole lower suction plate 5.

[0044] like Figure 1As shown, the air chamber 1 of the seed suction tray has a truncated pyramidal structure with trapezoidal sides. The opposite faces are symmetrical, and the four side edges are equal. Both the upper and lower bases are rectangular, with the upper base being smaller than the lower base. The lower base of the air chamber 1 is open. A contraction-type suction plate 4 is fixed to the lower base of the air chamber 1. The contraction-type suction plate 4 has 434 contraction-type suction holes 41. An expansion-type suction plate 5 is supported and fixed below the contraction-type suction plate 4 by a support plate 6. The expansion-type suction holes 51 of the expansion-type suction plate 5 correspond one-to-one with the straight holes 412 of the contraction-type suction plate 4, with no gap between the straight holes 412 and the expansion-type suction holes 51. Two air outlet pipes 2 are connected and fixed to the upper base of the air chamber 1. The working principle of the contraction-type suction holes 41 of the contraction-type suction plate 4 and the expansion-type suction holes 51 of the expansion-type suction plate 5 is as follows: Figure 9 , Figure 10 As shown, during air intake, a negative pressure is created in air chamber 1, and the seeds are adsorbed into the expanding suction hole 51. During seed discharge, motor 3 drives support plate 6 to move the lower suction plate 5 of the expanding hole upward, so that the straight hole 412 of the upper suction plate 4 of the contracting hole is inserted into the expanding suction hole 51 of the lower suction plate 5 of the expanding hole. Combined with air discharge, a positive pressure is created in the air chamber, discharging the seeds from the expanding suction hole 51. Partial structure simulating the air intake state of the suction hole is shown below. Figure 11 As shown, a portion of the structure simulating the suction port exhaust state is as follows: Figure 12 As shown, motor 3 drives the expanding-hole suction plate 5 to move upward, and the fan applies positive pressure to exhaust the air, discharging the seeds stuck in the suction hole. The workflow diagram is as follows. Figure 8 As shown, two fans are connected to the other end of the air outlet duct 2. When the fans start working, they draw in air under negative pressure. The robotic arm moves the seed suction plate close to the vibrating seed group and begins to suck in the seeds. The robotic arm moves the seed suction plate above the seedling tray and brings it close to 3cm above the seedling tray. The motor 3 drives the expanding hole lower suction plate 5 to move upward, so that all the straight holes 412 on the contracting hole upper suction plate 4 are partially embedded into all the expanding suction holes 51 of the expanding hole lower suction plate 5. The fan changes from negative pressure to positive pressure to cooperate in discharging seeds, thereby achieving the purpose of seed cleaning, preventing seeds from getting stuck in the suction holes, and improving the seeding qualification rate of the seeder.

[0045] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent methods or modifications that do not depart from the technology of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pneumatic precision seeder with an anti-jamming, retractable seed suction disc, characterized in that, include: Air chamber (1), air outlet duct (2), retractable hole upper suction plate (4), expandable hole lower suction plate (5), support plate (6), motor (3) and screw (7); The air outlet duct (2) is fixed on the air chamber (1), with one end connected to the fan and the other end connected to the inside of the air chamber (1), which can control the formation of positive or negative pressure inside the air chamber (1); The shrinkable hole suction plate (4) is fixed to the bottom surface of the air chamber to form a closed air chamber. The shrinkable hole suction plate (4) has shrinkable suction holes (41). The expanding hole lower suction plate (5) is located below the contracting hole upper suction plate (4) and the two can fit together seamlessly. The expanding hole lower suction plate (5) has an expanding suction hole (51). The expanding suction hole (51) is aligned with the contracting suction hole (41). The suction hole of the contracting hole upper suction plate (4) includes a V-shaped hole (411) and a straight hole (412). The V-shaped hole (411) is on top and the straight hole (412) is on the bottom. The straight hole (412) is aligned with the expanding suction hole (51) and can extend into the expanding suction hole (51). The V-shaped hole (411), the straight hole (412), and the expanding suction hole (51) form a seed channel. The support plate (6) is fixed at the edge of the expansion-type hole suction plate (5) where there is no hole; The screw (7) is fixed at the edge screw hole of the support plate (6); The motor (3) is connected to the upper end of the screw (7), and it can drive the support plate (6) and the expansion hole suction plate (5) to move up and down through (7); The air chamber (1) is a truncated pyramid structure with its upper and lower base surfaces parallel to each other. Both the upper and lower base surfaces are rectangular, and all four side edges are equal. The lower base surface is open. There are two air outlet ducts (2), which are symmetrically arranged at both ends of the bottom surface of the air chamber (1); There are two motors (3) and two support plates (6), which are symmetrically arranged at both ends of the bottom surface of the air chamber (1); The shrink-fit orifice suction plate (4) is a transparent plastic plate; The expansion-type hole suction plate (5) is a transparent plastic plate; When the seed suction plate approaches the vibrating seed population to prepare for seed suction, the fan is controlled to create negative pressure in the air chamber (1) to suction the seeds. The seeds are adsorbed into the expansion suction hole (51) of the expansion suction plate (5). Then, the seed suction plate is moved to 3cm above the seedling tray, and the expansion suction hole (51) is aligned with each hole in the seedling tray. The motor (3) drives the expansion suction plate (5) to move upward, and the straight hole (412) of the contraction suction plate (4) is inserted into the expansion suction hole (51) of the expansion suction plate (5). The seeds adsorbed or stuck in the expansion suction hole (51) are squeezed out of the suction hole. At the same time, the fan is used to create positive pressure in the air chamber (1) to discharge the seeds into the holes of the seedling tray, thus achieving seed discharge.

2. The anti-jamming, retractable seed suction disc for a pneumatic precision seeder according to claim 1, characterized in that, The upper suction plate (4) with shrink-type holes has 434 shrink-type suction holes (41).

3. The anti-jamming, retractable seed suction disc for a pneumatic precision seeder according to claim 2, characterized in that, There are 434 expansion holes (51) arranged on the expansion hole lower suction plate (5).

4. A control method for the anti-jamming scaling seed suction disc of the pneumatic precision seeder according to claim 1, characterized in that, When the seeder starts working, the seed suction plate is close to the vibrating seed group. The fan is controlled to create negative pressure in the air chamber (1) to suction the seeds. The seeds are suctioned into the expansion suction hole (51) of the expansion suction plate (5). The seed suction plate is then moved to 3cm above the seedling tray. The expansion suction hole (51) is aligned with each hole in the seedling tray. The motor (3) drives the expansion suction plate (5) to move upward. The straight hole (412) of the contraction suction plate (4) is inserted into the expansion suction hole (51) of the expansion suction plate (5). The seeds that are suctioned or stuck in the expansion suction hole (51) are squeezed out of the suction hole. At the same time, the fan is used to create positive pressure in the air chamber (1) to discharge the seeds into the holes of the seedling tray, thus achieving seed discharge.

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